Method of making separator discharge pans



Sept. 9, 1947. R. w; MUERLE METHOD OF AKING SEPARATOR DISCHARGE PANS Original Filed Dec. 8, 1941 charged into bucket-s or other containers.

Patented Sept. 9, 1 947 METHOD OF MAKINGjSEPARATOIt I DISCHARGE RAN S Richard W. Muerle, Springfield-, Ill., assignor to do primarily with an im- I .Thisinv'ention has to provement in the method of making of what is generally termed cream covers and skim milk covcream-from the separator to where it is dis- The skim milk is discharged from another portion ofthe rotating separator bowl, into another generally similar structure known as a skim milk cover or discharge'pan. In the past, it has been customary to make these covers of several pieces, generally steel stampings, and weld or solder the parts together to form a complete unit.

Since milk-is a highly perishable product, and the utmost importance is attached by State, city,

' and dairy inspectors and the like to all surfaces and passages contacted by the milk products :.during the process of separation, it is highly desirableth'at there be no ridges, roughly soldered ;seams, ,poor joints between spout and frame, and portions which resist regular efforts at cleaning. Despite this fact, even the latest styles of tinware (as these skim milk and cream covers are generally designated) have rough joints, crevices and portions that resist cleaning, and covered spouts. It is an object of this invention to provide a method of making a structure which will overcome these objections.

It is an object of applicants invention to eliminate soldering or other jointing of parts and surfaces used in th'e conduction of the milk and cream in the construction of this tinware.

It is a further object of applicants invention to provide a method of construction having less operations and requiring fewer tools and dies than other devices used for the same purpose.

It is a still further object to provide a method of securing to a one piece pan an annular skirt ring, while eliminating or reducing the size of joint crevices to such an extent that an unbroken coating of tin plate may be applied to the skirt and pan.

Other objects and advantages of the invention will appear as the nature of the improvements is better understood, the invention consisting substantially in the novel method of manufacture hereinafter fully described, illustrated in the ac- MontgomeryWard & 00., Incorporated, Chicage, 11]., a corporation of Illinois- Oi'iginal application December-8, 1941,. Serial No.

422,028. Divided" and this application "ary 19, 1945, Serial No. 578,105

. ,1Claim. (01.29-148) Febru- 2 companying drawing, and'finally pointed out in the appended claim. r

In the drawing, wherein like reference characters indicate like parts,

. directly into the spout portion of the device or known as draws.

Figure 2.

In cream separators, several pans, one nested in another, are employed for the collection of the separated milk and cream, each of which may be quite similar in structure, although differentiating one from the other for various reasons not-relating to the present invention.

Referring in particular to the construction shown in Figures 1, 2, and 3, which may be a cream cover or pan designated in its entirety as I 5, I have provided a construction which, with the exception of the mating flange 20; is stamped out of a single piece of metal using ordinary machinery and a series or dies. A single sheet of metal such as lightweight steel is placed in the dies and the spout I I and frame l8 and bottom I9 are stamped therefrom in a series of operations That is, the forming is partially done in what is known as a first draw and is continued ina second and additional draws until it is completely formed, trimmed and fin ished in its final dimensions. The unit is thu made from a single piece of metal.

This forms the device as an open spout which is easily cleaned, and the frame 3 and bottom I 9 merge into the spout I1 without a seam and with the various parts having generous radii which will not retard cleaning. Heretofore, the greatest difiiculty has been experienced in connecting the spout to the frame and bottom, and to my knowledge there is no construction on the market which does so, without welding or soldering, and with a, complete elimination of seams and angles. The open spout is cleaner than the closed spout first, because it is not necessary to form a seam, and secondly because a closed spout does not ofier ready access for thorough cleaning. Further, the elimination of sharp angles is seldom possible in a closed spout, and a closed spout must be joined to the rest of the structure by special operations.

As shown in my construction, I have provided the reinforcing flange 2| which adds strength to the construction and springiness and flexibility 2,427,299 3 4 so that the stacking of the float supporting cov- While I have herein shown and described cerer on the cream cover in assembling the units tain features of my invention, still I do not wish o peration is readily acco p s ed W t th to limit myself thereto, except as I may do so in arrangement, the diameter of the mating flange the claim. of the cover or pan above whichslips into the 5 Whatis-claimed is:

inner periphery of'the creamcover may be sub- The 'BIIlHlQd of making "a separator discharge stantially that of the cream cover, assuring a pan which comprises selecting a blank of suitable tight fit which will eliminate rattling and will hape t form an integral pan and spgut draw- Provide a gOOd p between t e mating Part5. ing said blank to form an annular trough of e a n fl nge is spot We e OthelYWiSe channel cross section and integral spout of chanattached to the bottom IQ of the cream cover. r-cr s section with one side wall of said spout The mating flange s pre l fl Welded zbeingisubstantially:upright and continuously and t0 t b 0f the Cream ThiSI-mat- Without break {flowing into the outer cylindrical n fla e e e s itself readily t h t skmwn ;upright walll-of -said annular trough and around as a coining operation which is performed aiter l5 rsaid trough and continuously and Without break the flange has been spot welded to the main fl mgq to thepther upright side wall of said frame- This coming Operation is usually 1 f spoutandwith thelbase of said spout channel beformed with a heavy press under considerable mg fl h with the base of Said trough and merg pressure and joins the flange to the mainfram ing without discontinuity of metal or break, androunds the edges to such an extent that no forming a flaring flange around the upper edge :seam is apparent after theentire unit has been ,Qfqsaidlside a nua t u ifo kheightaboveathe dipped into tin, and appears to .all practical pu-r base-0f id nulartroughalong the uppenedges -poses-as onepiece. There should-be no seams f afd idean of aid t id fl n bgi g anywhere on the tinware where bacteria can ,contmmusrand.. unbmkeny:Securingian jyajnnular breed and the -jointure-between the flange 20 angle cross Section member having a asefiurmg andthe frame-as-formed. above-is. of sucha satisflange portion and ldeplending skint :to jhwe rum factory type that there is no-Iseam left,-in the o-r- :d-erside of. Said annular Ltmugh ,gommg Liam -dinarrysense ofthe wordflange an'dssaid -skirtrtoiupse andfimtcenaid-skirt It will be understood that aftereachunit is upwardly intimate engagement with said formed, .it 115 generally dipped into :rnolten tin Waugh and said flange :int intimate ggngage ,which protects the surf-aces against corrosion, {mentftwithnsaidwmughzalonglitszedgeyvfandlwafing and makes the pan more sanitary. I pan, :Spout and {annular member Wimp-tin The L Stamped. out :togp v ean-un roken-.meta1lic,coating-, overall. -single;pi'eee'ofmetalan asingle operation.

:When'it is noted that the :cream andmilkcov- :RIGHARD W hersrmust beassembledeand;disassembled at least i twielea .dcsity. in normab orierai'gtng an;1 .ctihg'ogiagrhijRrEEERENCES (CITED y c eane so .as 0 pass. nsp 1 i =:tary, it will be readily seenithat the' simplified The'followmarejferencesare eC0rd-=in-the :and sanitary constructioncoi:applicants arrange- 40 file 0f 'p ?g' g n f y ope ding UNITED STATES PATENTS U is-app ica ionisa lV'lSlO o m -c l n I 1 application Serial No.-.422,028,filedJDecember-S, gzg' Name ew r1941, nowlatent No. 2,379,647. 5-2 23 W l r. A pr fi, 194 1 The formaof the invention here-in shownand 47 u fle 3, 1945 rdescribed presents a preferred embodiment 51 3 l O-I Vath .=lV Ia-r, 2, 1 926 :thereof, and delineates its adaption=to practif tn -Mar.:2, 1926 .;calsuse,,but it is to be understood .thatthepres- 73 mg ept. l'1-, 192 3 .ent disclosure: isto be considered from the ,illus- -2 3 B c ;Aug. -l6,,-1 -940 'trative standpoint and not as imposing erestric n 1s497 633 ge :June "10, 1924 .tion'l or" limitation on the invention. E A e ig Dec. 2 119115 

